A micro-grid system with a power supply is disclosed according to one embodiment of the present invention. The micro-grid system with a power supply, according to one embodiment of the present invention, comprises: a first node having AC power applied thereto from a bus system; a first generator for applying DC power to a second node; a first load for receiving the AC power by being connected to a third node; a second load for receiving the DC power by being connected to the second node; a third load for receiving the AC power by being connected to a fourth node; a first converter for converting the DC power of the second node to AC power, and outputting same; a second converter for converting the DC power of the second node to AC power, and outputting same; and a switch unit for, according to the statuses of the first converter and the second converter, regulating the connection relations between the first node, the third node, the fourth node, the first converter and the second converter.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The microgrid system with a power supply of claim 1, wherein when AC power is applied to the first node from the bus system and the first converter is normal, the switch unit connects the first node to the fourth node, and connects the first node to the third node.
3. The microgrid system with a power supply of claim 2, wherein the switch unit adjusts the connection relationship so that the AC power output from the first converter is applied to the third node.
4. The microgrid system with a power supply of claim 1, wherein when AC power is not applied to the first node from the bus system and the first converter and the second converter are normal, the switch unit adjusts the connection relationship so that the AC power output from the first converter is applied to the third node, and the AC power output from the second converter is applied to the fourth node.
5. The microgrid system with a power supply of claim 1, wherein when AC power is not applied to the first node from the bus system, the first converter does not operate, and the second converter is normal, the switch unit adjusts the connection relationship so that the AC power output from the second converter is applied to the fourth node, and the fourth node and the third node are connected.
6. The microgrid system with a power supply of claim 1, wherein when AC power is not applied from the bus system to the first node, the fifth node and the third node are connected to supply AC power from the second generator and AC power from the first converter to the first load, such that the second generator and the first converter are converted to a parallel operation mode.
11. The microgrid system with a power supply of claim 8, wherein the microgrid system with a power supply further comprises a ninth switch connected between the bus system and the first node.
12. The microgrid system with a power supply of claim 8, wherein when AC power is applied to the first node from the bus system and the first converter and the second converter are normal, the first switch connects the first node and the sixth node, and the second switch, the fourth switch, the fifth switch, and the seventh switch are turned-on, and the third switch and the sixth switch are turned-off.
13. The microgrid system with a power supply of claim 8, wherein when AC power is not applied to the first node from the bus system and the first converter and the second converter are normal, the first switch connects the fifth node and the sixth node, and the fourth switch, the fifth switch, and the sixth switch are turned-on, and the second switch, the third switch, and the seventh switch are turned-off.
14. The microgrid system with a power supply of claim 8, wherein when AC power is not applied to the first node from the bus system, the first converter is normal, and the second converter does not operate, the first switch connects the fifth node to the sixth node, the third switch, the fourth switch, the fifth switch, and the seventh switch are turned-on, and the second switch and the sixth switch are turned-off.
15. The microgrid system with a power supply of claim 8, wherein when AC power is not applied to the first node from the bus system, the second converter is normal, and the first converter does not operate, the first switch connects the fifth node to the sixth node, the third switch, the fourth switch, the sixth switch, and the seventh switch are turned-on, and the second switch and the fifth switch are turned-off.
16. The microgrid system with a power supply of claim 8, wherein when AC power is not applied to the first node from the bus system, and the first converter and the second converter do not operate, the first switch connects the fifth node to the sixth node, the third switch, the fourth switch, and the seventh switch are turned-on, and the second switch, the fifth switch, and the sixth switch are turned-off.
17. The microgrid system with a power supply of claim 8, wherein the first converter is a bidirectional converter further performing a function of converting AC power of a third node into DC power and outputting the same, wherein the second converter is an inverter.
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December 11, 2019
September 27, 2022
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